import logging
from rest_framework.views import exception_handler as drf_exception_handler
from rest_framework.response import Response
from rest_framework import status

from django.db import DatabaseError
from redis.exceptions import RedisError

# 获取在配置文件中定义的logger，用来记录日志
logger = logging.getLogger('django')

def exception_handler(exc, context):
    """
    自定义异常处理
    :param exc: 异常信息
    :param context: 抛出异常的上下文
    :return: Response响应对象
    """
    # 调用drf框架原生的异常处理方法
    response = drf_exception_handler(exc,context)

    if not response:
        # 获取视图对象
        view = context['view']
        if isinstance(exc,DatabaseError) or isinstance(exc,RedisError):
            # 数据库异常的补充
            logger.error('[%s]:%s' % (view,type(exc)))
            response = Response({
                'message':'服务器奔溃了呢',
            },status = status.HTTP_507_INSUFFICIENT_STORAGE)

    return response